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相关概念视频

Virtual Work for a System of Connected Rigid Bodies01:06

Virtual Work for a System of Connected Rigid Bodies

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Virtual work is a powerful method used to solve problems involving several connected rigid bodies. When the system is in equilibrium, virtual work is zero. This allows the calculation of the resulting forces when a system undergoes a virtual displacement. When attempting to analyze such a system, first, use a free-body diagram, where an independent coordinate represents the configuration of the links, and mark its deflected position resulting from the positive virtual displacement.
Next,...
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Mechanical Efficiency of Real Machines01:14

Mechanical Efficiency of Real Machines

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The mechanical efficiency of a machine is a fundamental concept that describes how effectively a machine can convert input work into output work. According to this concept, the efficiency of a machine is equal to the ratio of the output work to the input work. An ideal machine, meaning a machine that has no energy losses, has an efficiency of one. This implies that the input work and the output work are equal.
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相关实验视频

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Training Persons with Spinal Cord Injury to Ambulate Using a Powered Exoskeleton
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可穿戴外骨的节能执行:一个虚拟原型.

Asim Ghaffar1, Abdur Rehman2, Muhammad Tanveer Riaz1

  • 1Department of Mechanical, Mechatronics and Manufacturing Engineering, University of Engineering and Technology Lahore, Faisalabad Campus, Faisalabad, Pakistan, uet.edu.pk.

Applied bionics and biomechanics
|November 24, 2025
PubMed
概括

这项研究优化了可穿戴式外骨辅助 actuation 系统,以减少功耗. 双变平行弹性执行 (VPEA) 系统被证明是最节能的,验证了未来外骨架设计的数学模型.

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科学领域:

  • 机器人技术 机器人技术 机器人技术
  • 生物力学 生物力学
  • 机械工程 机械工程

背景情况:

  • 辅助可穿戴外骨需要高效的执行系统来最大限度地降低功耗.
  • 优化执行对于延长外骨运行时间和用户舒适性至关重要.

研究的目的:

  • 调查和比较各种辅助可穿戴外骨执行系统的功耗.
  • 通过虚拟实验框架对数学模型进行验证,以分析执行系统的效率.

主要方法:

  • 使用虚拟实验框架来模拟和分析不同的驱动系统变体.
  • 评估了刚性,连续弹性和并行弹性执行系统 (单个和双重配置).
  • 结果与开发的数学模型进行了比较.

主要成果:

  • 在虚拟和数学模型之间观察到强烈的相关性,表明高精度.
  • 将声驱动器与皮带和滑轮机制相结合,减少了能源消耗.
  • 具有特定关节配置的双变平行弹性执行 (VPEA) 系统显示了最低的功耗.

结论:

  • 数学模型准确地预测了外骨执行系统的功耗.
  • 双VPEA配置为外骨架设计提供了显著的能源效率优势.
  • 研究结果为优化执行系统提供了指导方针,以提高外骨性能和效率.